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Flight Management System (FMS) for the Agusta AW139/AB139 Helicopter
ATC clearance is received to the cruise altitude and the selector is
D
dialed to the cleared altitude (7).
The IAS button is pushed to resume the climb (7).
D
The flight guidance computer conducts a normal level off at the
D
cruise altitude (8) switching from VFLCH to ASEL to ALT with the
normal 1000 foot selector alert and the speed command changes
to the cruise value.
VNAV FLIGHT LEVEL CHANGE DESCENT (VFLCH)
The elements of a VNAV FLCH (IAS or MACH hold) descent profile are
shown in Figure 7--23.
A VFLCH descent is flown at any time by using the following:
From cruise altitude (1), dial down the altitude preselector to the
D
ATC cleared altitude (2) and selecting IAS.
FMS changes to descent.
D
An ATC clearance (5) is received to a lower altitude and the altitude
D
preselector is lowered (6). IAS is pushed (5) and the aircraft begins
a descent.
A28- - 1146- - 181
REV 3 Mar 2009
Honeywell International Inc. Do not copy without express permission of Honeywell.
Figure 7- -23
VNAV Flight Level Change Descent
Flight Plan
7-43
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